What is the best explanation for why graphite is slippery whereas diamond is not?
a. Because electrons in graphite are delocalized, but the electrons in diamond are not.
b. Because the bonding in graphite and diamond is different.
c. Because sheets of graphite are held to each other by weak LDFs whereas only covalent bonds exist within diamond.
d. Because the covalent bonds in graphite are weaker than the covalent bonds in diamond.
What is the best explanation for why graphite is slippery whereas diamond is not? a. Because...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...
43. Oxygen has 8 electrons and Argon has 18 electrons. What type of molecule would be formed it these two elements reacted. a) No reaction would occur. b) They would form an lonic hond with the Amon giving electrons to Oxygen. c) They would form a covalent bond by sharing 2 electrons. d) 2 argons would bond to oxygen. e) C and D are possible. 44. Magnesium (*2 Mg 24) forms bonds with how many Chlorine (CIS) atoms? a) 4,...
According to Robert Trivers, why are men generally larger and more physically aggressive than women? Because women are more reproductively “valuable” than men, hence competition for mates is fiercer among men Because men invest more heavily in reproduction than women Because men secrete more testosterone Trivers’ theory does not speculate on the origin of the sex difference in size and physical aggression Although some women are interested in casual sex (short-term mating), research has suggested that there are differences in...
A covalent bond is a
bond in which electrons are shared between atoms of elements. A
covalent bond can be polar or nonpolar. In a nonpolar covalent
bond, the bond is between two identical atoms and the electrons are
evenly shared between the atoms.In contrast, in a
polar covalent bond, the bond is between two nonidentical atoms and
the electrons are unevenly shared between the atoms. The uneven
sharing of electrons takes place because of the difference in the
electronegativity...
1.. When a hydrogen (H) atom collides with a chlorine (Cl2) molecule, the following reaction occurs with release of energy: H (g) + Cl2 (g) --> HCl (g) + Cl (g) Which ONE of the following statements is true? Group of answer choices a. The relative bond strengths cannot be determined from the information provided. b. The H – Cl bond is stronger than the Cl – Cl bond. c. The H – Cl bond is weaker than the Cl...
5. Aluminium (Group III) and Silicon Group (IV) are adjacent to each other on the periodic table. Relative to aluminium, silicon is less dense and has a higher melting temperatures, is harder and is very prevalent in sand and rocks. Yet, aluminium has more mechanical applications in engineering systems while Si finds more applications in electronic systems Explain how the functional properties of these element arise and why they are suited for different functions. 6. Suppose an element has a...
Pre-Lab Exercise 2-3 Chemical Bonding One of the more challenging concepts to grasp in chemistry is chemical bonding, a topic that pops up again and again in A&P: We revisit it in cytology, the nervous system, blood, respiration, and digestion-to name just a few First let's do some basics. Use your textbook and this unit to answer the following questions 1. Do metals donate or accept electrons? What do they become after they donate/accept electrons? 2. Do nonmetals donate or...
No need for Explanation
The CFO of a major corporation is trying to decide on what project to pursue using different investment criteria: Net Present Value (NPV), Payback Period, Discounted Payback Period, Internal Rate of Return (IRR), and the Profitability Index (PI). The CFO has four projects to choose between: Project W (which is a strip mine - see problem 6), Project X, Project Y, and Project Z. Additional information about each project is summarized below. You can use the...
VSEPR Objective : This lab is to study the shape and polarity of molecules using VSEPR theory with emphasis on sigma bonds (Part 1) and pi bonds and resonance (Part 2) Procedures: Nothing to do before the lab. We are making the models together in class. Prelab Questions : PART 1: (PL1) Draw the Lewis dot structure of each compound (as having covalent bonds). (a) BeH2 (b) BH3 (c) GeH2 (d) CH4 (e) NH3 (f) H2O (g) PCl5 (h)...
Create 20 questions like this. A-E optios with explanation and also mention the correct one. Dale's Principle states: If a particular neurotransmitter is released by one of a neuron's synaptic endings, only that same transmitter is released at all synaptic endings of that neuron. Q1: Why is this statement half right but also half wrong? A. a knowledge of neuromodulators was unknown to Dale B. Neuromodulators are the brain’s major neurotransmitters *C. Dale is half right about the 7 classical...